Security
Configuring TACACS+
336 Cisco Small Business 200, 300 and 500 Series Managed Switch Administration Guide (Internal Version) 
18
• Source IPv4 —(In Layer 3 system mode only) Select the device IPv4 
source interface to be used in messages sent for communication with the 
TACAC S +  s e r ver.  
• Source IPv6 —(In Layer 3 system mode only) Select the device IPv6 
source interface to be used in messages sent for communication with the 
TACAC S +  s e r ver.  
NOTE If the Auto option is selected, the system takes the source IP address 
from the IP address defined on the outgoing interface.
STEP  4 Click Apply. The TACACS+ default settings are added to the Running 
Configuration file. These are used if the equivalent parameters are not defined in 
the Add page.
STEP  5 To add a TACACS+ server, click Add.
STEP  6 Enter the parameters.
• Server Definition—Select one of the following ways to identify the 
TACAC S +  s e r ver :
- By IP Address—If this is selected, enter the IP address of the server in 
the Server IP Address/Name field.
- By Name—If this is selected enter the name of the server in the Server IP 
Address/Name field.
• IP Version—Select the supported IP version of the source address: IPv6 or 
IPv4. 
• IPv6 Address Type—Select the IPv6 address type (if IPv6 is used). The 
options are:
- Link Local—The IPv6 address uniquely identifies hosts on a single 
network link. A link local address has a prefix of FE80, is not routable, and 
can be used for communication only on the local network. Only one link 
local address is supported. If a link local address exists on the interface, 
this entry replaces the address in the configuration.
- Global—The IPv6 address is a global Unicast IPV6 type that is visible and 
reachable from other networks.
• Link Local Interface—Select the link local interface (if IPv6 Address Type 
Link Local is selected) from the list. 
• Server IP Address/Name—Enter the IP address or name of the TACACS+ 
server.